feat: show documents link only when applicable

src/BusProNet/Model/Booking.php

@@ -19,7 +19,7 @@ class Booking
     public ?Travel $travelData = null;
     public ?int $hotelId = null;
     public ?string $hotelName = null;
-    public ?bool $document = null;
+    public bool $hasDocuments = false;
     public ?float $payment = null;
     public ?string $paymentId = null;
     public ?string $paymentType = null;

src/BusProNet/XmlParser/BookingsParser.php

@@ -31,10 +31,12 @@ class BookingsParser extends AbstractParser
             $booking->travelId = $this->getIntOrNullValue($node->filterXPath('//idreise'));
             $booking->travelDate = $this
                 ->stringToDate($this->getStringOrNullValue($node->filterXPath('//reisedatum')));
-            $booking->document = $this
+            $booking->hasDocuments = $this
                 ->stringToBool($this->getStringOrNullValue($node->filterXPath('//reisedokument')));
             $booking->payment = $this
                 ->stringToFloat($this->getStringOrNullValue($node->filterXPath('//zahlung')));
+            $booking->hasDocuments = $this
+                ->stringToBool($this->getStringOrNullValue($node->filterXPath('//reisedokument')));
 
             $bookings[] = $booking;
         });